Path: utzoo!dptcdc!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ukma!xanth!mcnc!ece-csc!ncrcae!hubcap
From: hubcap@hubcap.clemson.edu (Mike Marshall)
Newsgroups: comp.mail.sendmail
Subject: MX records...
Keywords: vicious circle...
Message-ID: <5140@hubcap.clemson.edu>
Date: 17 Apr 89 19:31:56 GMT
Organization: Clemson University, Clemson, SC
Lines: 17

host X has two MX records           10 -> host X
                                    20 -> host Y

When X is down, mail for X from all over the Internet queues up on
host Y.

Mail for X, that is, from all over the Internet EXCEPT from host Y. 
When Y tries to send mail to X and X's address MXs over to Y... 

553 Local configuration error, hostname not recognized as local

I would guess that sendmail is smart enough to do the right thing, and
that there is something I haven't configured properly. Any clues?...

thanks...

-Mike Marshall        hubcap@hubcap.clemson.edu